JPH10274250A - Cup-like socket member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily provide a specified inner surface shape by forming recessed parts in the inner and outer peripheral sides of a cup-like rough shaping material corresponding to the plurality of grooves of a cup-like socket member and forming its thickness to be roughly uniform in a radial direction section over the full area of a circumferential direction. SOLUTION: Plastic working is perfomed for the inner and outer peripheral sides of a cup-like rough shaping material, and thereby a cuplike socket member 2 is formed. A shaft-shaped rough shaping material is also subjected to plastic working to form a connection shaft member 3, and thereby an outer ring member 1 composed of the cup-like socket member 2 and the connection shaft member 3 is formed as a whole. Here, when the cup-like socket member 2 is subjected to plastic working, since the cup-like rough shaping material has a thickness (t) in its radial direction section formed to be roughly uniform overt the full area of a circumferential direction, in other words since it is formed roughly uniformly in the parts of recessed parts 9 and 10 and a remaining part, without any difference produced in rigidity, it is easily formed over the full regions of the rough shaping material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cup-shaped socket member applied to an outer ring member of a ball joint and the like.

[0002]

2. Description of the Related Art As shown in, for example, Japanese Utility Model Laid-Open Publication No. 63-174939, this type of cup-shaped socket member has a plurality of grooves formed substantially in the axial direction on an inner peripheral side thereof. It is formed by plastic working from a rough shaped material. A ball or the like as a power transmission member is housed in the plurality of grooves.

That is, the cup-shaped rough material is placed in an outer die, and a working punch (inner die) is placed inside the cup-shaped rough material. By pressing the inner circumferential surface of the material in the radial direction, a cup-shaped socket member having a plurality of grooves on the inner circumferential side can be obtained.

[0004]

However, in the conventional example, although a plurality of grooves formed substantially in the axial direction on the inner peripheral side of the cup-shaped socket member, the outer peripheral side is substantially true. It is formed in a circular shape. Therefore, the cup-shaped crude material is provided with depressions corresponding to the plurality of grooves of the cup-shaped socket member on the inner peripheral side, and is formed in a substantially perfect circular shape on the outer peripheral side. In other words, the thickness of the cup-shaped crude material in the radial cross section is thin in the portion where the groove is formed and thick in the remaining portion, and has a difference in rigidity due to the difference in thickness. become.

For this reason, during plastic working, although a thin portion having low rigidity can be formed relatively easily, it is difficult to form a thick portion having high rigidity, and a predetermined inner surface shape may not be obtained. is there.

In particular, it is difficult to obtain a so-called undercut shape in which the internal space of the cup-shaped socket member has a substantially spherical shape and the diameter of the opening is smaller than the internal diameter. In such a case, it may be necessary to add a mechanical process to the inner peripheral side of the cup-shaped socket member after the plastic working.

The present invention has been devised in view of the above conventional circumstances, and has as its object to provide a cup-shaped socket member which can be easily processed and can easily obtain a predetermined inner surface shape. .

[0008]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a cup-shaped article formed by plastic working from a cup-shaped rough material and having a plurality of grooves formed substantially in the axial direction on the inner peripheral side. In the socket member, on the outer peripheral side of the cup-shaped socket member, a substantially axial groove is formed between grooves adjacent to the groove formed on the inner peripheral side, and the cup-shaped rough shape is formed. The material has depressions corresponding to the plurality of grooves of the cup-shaped socket member on the inner peripheral side and the outer peripheral side, and has a configuration in which the thickness in the radial cross section is formed substantially uniformly over the entire area in the circumferential direction. It is.

Here, the cup-shaped socket member is subjected to plastic working by an outer die arranged outside the cup-shaped rough material and an inner die arranged inside, thereby forming a predetermined inner surface shape.

[0010] At this time, the cup-shaped crude material is formed so that its thickness in the radial cross section is substantially uniform over the entire area in the circumferential direction, that is, the portion where the dent is formed and the remaining portion. Is formed substantially uniformly in the portion, no difference in rigidity occurs, and it is easily formed over the entire area of the coarse material.

Therefore, a cup-shaped socket member which can be easily processed and which can easily obtain a predetermined inner surface shape can be obtained. In addition, since molding is easy, there is no need to perform special machining or the like even in an undercut shape, and it is possible to reduce the manufacturing cost and
As a result, it is also possible to abolish the grinding and finishing of grooves and the like.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as an embodiment applied to an outer ring member of a ball joint.

FIG. 1 is a view showing an embodiment of the present invention.
FIG. 3 is a cross-sectional view of an outer race member to which the cup-shaped socket member of the present invention is applied, and is a cross-sectional view taken along line AOA of FIG. 2. FIG. 2 is a sectional view taken along line BB of FIG. FIG. 3 is a cross-sectional view of a coarse member of the outer ring member including the cup-shaped coarse member before the outer ring member shown in FIG. 1 is obtained by plastic working, and is a cross-sectional view taken along line AOA of FIG. FIG. 4 is a sectional view taken along line BB of FIG.

In FIG. 1, reference numeral 1 denotes an outer ring member of a ball joint.
The outer ring member 1 includes a cup-shaped socket member 2 and a connecting shaft member 3 integrally provided on the bottom of the cup-shaped socket member 2.

The internal space of the cup-shaped socket member 2 is formed in a substantially spherical shape.
A plurality of (six in the embodiment shown in FIG. 1) grooves 4 are formed substantially in the axial direction. A groove 4 formed on the inner peripheral side is formed on the outer peripheral side of the cup-shaped socket member 2.
A substantially axial groove 5 is formed between adjacent grooves 4. The groove 4 has an arc-shaped cross section in order to accommodate a ball (not shown) constituting the joint and to achieve smooth rolling thereof, and is curved along the inner peripheral shape as a whole. The groove 5 has a substantially U-shaped cross section and a substantially straight line.

As shown in FIG. 3 and FIG. 4, the rough shaped material 6 forming the outer ring member 1 includes a cup shaped rough shaped material 7 forming the cup shaped socket member 2 and a cup shaped rough shaped material. 7
And a shaft-shaped rough member 8 forming the connecting shaft member 3 integrally provided at the bottom of the shaft.

The cup-shaped rough member 7 has depressions 9 and 10 corresponding to the plurality of grooves 4 and 5 of the cup-shaped socket member 2 on the inner peripheral side and the outer peripheral side. The thickness t of the cup-shaped crude material 7 in the radial cross section is substantially uniform over the entire area in the circumferential direction (see FIG. 4).

The cup-shaped socket member 2 of the outer ring member 1
Is formed as follows. That is, as shown in FIG. 5, first, the cup-shaped crude material 7 is arranged in the outer die 11. At this time, a molding surface 12 for forming a predetermined outer surface shape on the outer peripheral surface of the cup-shaped socket member 2 is formed on the inner peripheral side of the outer die 11.
Is formed with a convex portion (not shown) for forming the groove 5, and the convex portion and the depression 10 are arranged in a state corresponding to each other. The outer die 11 is divided in the circumferential direction and is arranged on a die base (not shown), and is movable in the radial direction of the cup-shaped rough material 7. The cup-shaped rough material 7 is placed in the outer die 11 by moving outward in the direction.

Next, the inner die 13 is inserted from the opening end side into the cup-shaped crude material 7 arranged in the outer die 11 (see FIG. 5B). Here, the inner die 13 is divided in the circumferential direction to form a cup-shaped rough material 7.
Are arranged in an annular shape on the inner peripheral side of the inner die 1.
3 has a cup-shaped rough material 7 on its outer peripheral side (more specifically, on the outer peripheral side of the plurality of inner dies 13 arranged in an annular shape).
Forming surface 14 for forming a predetermined inner surface shape on the inner peripheral surface of
Is formed on the molding surface 14, and a convex portion 15 for forming the groove 4 is formed.
And are arranged in a state where they correspond to each other.

Thereafter, the molding surface 14 of the inner die 13 is formed.
With this, a predetermined inner surface shape is formed on the inner peripheral surface of the cup-shaped rough material 7, and a predetermined outer surface shape is formed on the outer peripheral surface of the cup-shaped rough material 7 with the molding surface 12 of the outer die 11.

That is, a mandrel 16 is arranged on the inner peripheral side of the inner die 13 (more specifically, on the inner peripheral side of the plurality of annularly arranged inner dies 13) so that it can be inserted and removed. An inclined surface 18 is formed which conforms to the formed conical surface 17 so that the inner die 13 can be moved radially by inserting and removing the mandrel 16. Then, the mandrel 16 is moved forward in a state where the inner die 13 is arranged inside the cup-shaped rough material 7 to move the inner die 13 radially outward, and the forming surface 1 of the inner die 13 is formed.
In step 4, the inner peripheral surface of the cup-shaped crude material 7 is pressure-formed. Thereby, a predetermined inner surface shape is formed on the inner peripheral side of the cup-shaped rough material 7.

At the same time, when the inner die 13 moves to the forming position, the outer peripheral surface of the cup-shaped rough material 7 is pressed against the inner peripheral side of the outer die 11, and the inner peripheral surface of the outer die 11 is pressed. The outer peripheral surface of the cup-shaped rough material 7 is formed by the forming surface 12 formed as described above. As a result, a predetermined outer surface shape is formed on the outer peripheral side of the cup-shaped crude material 7.

As a result, the inner peripheral side and the outer peripheral side of the cup-shaped crude material 7 are subjected to plastic working, whereby the cup-shaped socket member 2 is formed. In addition, by appropriately processing the shaft-shaped rough shaped material 8 and forming the connection shaft member 3,
As a whole, the cup-shaped socket member 2 and the connecting shaft member 3
Is formed.

Here, when the cup-shaped socket member 2 is subjected to plastic working, the cup-shaped crude material 7 is formed so that the thickness t in the radial cross section thereof is substantially uniform over the entire region in the circumferential direction. That is, since the recesses 9 and 10 are formed substantially uniformly in the formed portion and in the remaining portion, there is no difference in rigidity, and the rough material 7 is formed.
Is easily formed over the entire area of

Therefore, the cup-shaped socket member 2 which can be easily processed and can easily obtain a predetermined inner surface shape is obtained. Also, since the molding is easy, it is not necessary to perform special machining even in the undercut shape, so that the manufacturing cost can be reduced and the grinding and finishing of the groove 4 and the like can be achieved. It can be abolished.

Although the embodiment has been described with reference to the drawings, the specific configuration is not limited to this embodiment, and can be changed without departing from the gist of the invention.

[0027]

As described above in detail, according to the present invention, a cup-shaped socket member which can be easily processed and can easily obtain a predetermined inner surface shape can be obtained.

[Brief description of the drawings]

FIG. 1 is a drawing showing an embodiment of the present invention, and is a cross-sectional view of an outer ring member of a ball joint to which a cup-shaped socket member of the present invention is applied, and is a cross-sectional view taken along line AOA of FIG.

FIG. 2 is a sectional view taken along line BB of FIG.

3 is a cross-sectional view of a coarse material of an outer ring member including a cup-shaped coarse material before the outer ring member shown in FIG. 1 is obtained by plastic working, and is a cross-sectional view taken along line AOA of FIG. 4; .

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 shows a state in which the cup-shaped socket member is processed in a state in which the cup-shaped coarse material is arranged in the outer die (a), and the inner die is inserted into the cup-shaped coarse material to obtain a predetermined inner circumference. It is explanatory drawing shown in the state (b) which forms a surface shape.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 outer ring member 2 cup-shaped socket member 3 connecting shaft member 4, 5 groove 6 coarse material of outer ring member 7 cup-shaped rough material 8 shaft-shaped coarse material 9, recess

Claims (1)

[Claims] 1. A cup-shaped socket member formed by plastic working from a cup-shaped rough material and having a plurality of grooves formed in an inner peripheral side in a substantially axial direction, wherein an outer peripheral side of said cup-shaped socket member is provided. A substantially axial groove is formed between adjacent grooves of the groove formed on the inner peripheral side, and the cup-shaped coarse material is formed into a cup-shaped socket member on the inner peripheral side and the outer peripheral side. A cup-shaped socket member having a depression corresponding to the plurality of grooves and having a substantially uniform thickness in a radial cross-section over the entire circumferential direction.